245
votes
16answers
179k views

How can I remove malicious spyware, malware, viruses or rootkits from my PC?

What should I do if my Windows computer seems to be infected with a virus or malware? What are the symptoms of an infection? What should I do after noticing an infection? What can I do to get rid of ...
80
votes
1answer
9k views

Windows 7 and Vista Activation FAQ: How do language, version, 64-bit or 32-bit, and source affect ability to install and transfer Windows licenses?

We get a lot of questions on Super User about Windows activation and licensing. This question is an attempt to answer the most common questions in one place with a canonical answer. When ...
111
votes
3answers
154k views

Where can I download Windows 7 (legally from Microsoft)?

I just bought a serial for Windows 7 on-line from the Microsoft store (the most painful shopping experience EVER!). I selected that I wanted to download my version of Windows 7 after purchase. After ...
176
votes
19answers
54k views

How can I visualize the file system usage on Windows?

How can I visualize which folders and files are taking up all of the space on my hard drive? I'm getting some conflicting reports on the size of hard drive contents. Namely what is and isn't there ...
156
votes
7answers
176k views

What are PATH and other environment variables, and how can I set or use them?

Questions about setting environment variables the PATH are very common here, and in most cases the answers are very similar to each other. In the future it would be nice to have a good Q/A for ...
56
votes
8answers
19k views

Why does Windows only show about 3.5 GB of my more than 4 GB of RAM?

I recently upgraded my computer's RAM to 4 GB. My 32-bit Windows installation shows only 3574 MB of the memory. How can I make Windows use the full amount of RAM?
153
votes
19answers
27k views

32-bit vs. 64-bit systems

What are the differences between 32-bit and 64-bit systems? If you have used both of them, what kind of sharp differences have you experienced? Would it be a problem to use 32-bit programs on ...
128
votes
13answers
222k views

How can I download an entire website?

How can I download all pages from a website? Any platform is fine.
51
votes
6answers
15k views

How do I reset the Windows XP Administrator password?

I have forgotten the Administrator password of my Windows XP installation and locked out. Is there a way to reset it? I do have physical access to the PC.
119
votes
18answers
233k views

What utility can move my Windows boot partition over to another hard drive? [closed]

Can anyone recommend a cheap/free utility that can do this without very much effort? My preference is that it would be really easy. Boot into Windows Pick drive to move Pick target drive It copies ...
82
votes
9answers
243k views

What can I do if I forgot my Windows 7 password?

I got a brand new Windows 7 machine, installed the operating system, created one account and forgot its password. What can I do? There is no external CD, the operating system is loaded from somewhere ...
57
votes
3answers
82k views

How can I reinstall Windows 7 if I lost my installation DVD? [duplicate]

Possible Duplicate: Where do I download Windows 7 (legally from Microsoft)? I have lost my Windows 7 installation DVD, but I do have the license key. How can I get a Windows 7 DVD? Can I ...
71
votes
10answers
5k views

Securely erasing all data from a hard drive

I am about to sell my old desktop PC and I am cautious about some of my sensitive information being available to the purchaser, even after reformatting the hard-drive, using data recovery software. ...
130
votes
10answers
68k views

Why does the /winsxs folder grow so large, and can it be made smaller?

A Vista virtual machine I use only has a 10 GB virtual hard disk -- and I'm worried about it running out of space over time. I used TreeSize to check for the culprits.. And the primary culprit is ...
30
votes
14answers
60k views

How can I monitor all and any internet traffic from my home PC?

I would like to monitor all and any internet traffic from my home PC to see what programs installed on my home machine are accessing the internet. I thought I could use Fiddler for this but I noticed ...
44
votes
16answers
82k views

How do I troubleshoot a Windows 7 freeze or slowness?

A machine is described as being "really slow" or "freezing". How can I troubleshoot/resolve this issue? What should be the first steps to take?
70
votes
7answers
29k views

Can I use my laptop as a second monitor?

Is it possible to make my laptop's screen act as a second monitor for my desktop computer?
54
votes
8answers
72k views

Install Windows 7 from USB flash drive

I have an ISO image of the Windows 7 installation DVD, but I can't burn it to CD or DVD. I have an empty flash drive with plenty of space. Is there any way I can put the ISO image on it and install ...
121
votes
10answers
46k views

Is it better to use a laptop on battery or on AC power?

When I'm at home, is it better to use the laptop plugged into AC power, or with just the battery, for the overall battery life?
45
votes
24answers
6k views

Software to backup data and files on a Windows computer [closed]

I have data and files on my system, running Windows, and want to make sure that I don't lose all the data or information when it gets toasted, either by a power surge or corrupted medium. I've heard ...
32
votes
4answers
15k views

Where can I download Windows 8 legally, from Microsoft?

I obtained a licence key for Windows 8 through DreamSpark. Is there a way to download a Windows 8 ISO image like you could for Windows 7? I am on a non-Windows machine, so I cannot use the Secure ...
168
votes
7answers
71k views

Should laptops remain plugged in when their battery is 100% charged?

When your laptop's battery is 100% charged, should you leave it plugged in so any battery power doesn't get used, or will that cause overcharging, overheating, etc.? Should the laptop be unplugged ...
28
votes
4answers
19k views

Installing Windows XP from USB pen drive

I want to install Windows XP on my desktop computer (only XP) but my CD drive is not working. I've only found installation tutorials on how to install it on the pen drive rather than from the pen ...
16
votes
8answers
73k views

How can I monitor internet usage in my network?

I need to know which computer is consuming my bandwidth. Is there a tool to do this?
16
votes
0answers
6k views

How do I troubleshoot a Windows 7 freeze or slowness? [duplicate]

Possible Duplicate: What are the first steps for diagnosing a slow machine? I have a new pc with windows 7 which freezes randomly. I hit every single key on the keyboard and it works again. ...
129
votes
15answers
258k views

How do I place a bootable ISO on a USB drive?

What's the best way of placing a bootable ISO on a USB drive? ISOs such as a live Linux preview disk, Windows installation ISO, etc.
67
votes
8answers
76k views

How can I add an item to the 'new' context menu?

When I right click anywhere I get an option to add a new file file a specified extension. I would like to add some custom files into this menu, so I can right click and create a new PHP file for ...
92
votes
5answers
32k views

Is it possible to use the IE10 App without making Internet Explorer the default browser?

Windows 8 comes with two versions of Internet Explorer: the normal desktop version, which looks just like IE9, and the Modern UI version, which is a full-screen tablet-style app. By default, links ...
43
votes
8answers
9k views

Cross-platform file system

I would like my external drives to be readable and writable from Linux, Mac OS X and Windows. FAT32 works, but the 4 GB file size limit is a showstopper these days. Are there any alternatives?
14
votes
2answers
11k views

Can I safely charge my laptop with a non-standard, third-party charger?

I have a Toshiba Satellite laptop. My charger has stopped working. I have access to a Lenovo charger. Can I use this charger on my laptop?
76
votes
1answer
100k views

What is port forwarding and what is it used for?

There are a lot of questions on 'port forwarding' but there doesn't seem to be one that clearly states what it is and what it's used for. So: What is Port Forwarding? What is it used for, and why ...
56
votes
4answers
10k views

What is a Codec (e.g. DivX?), and how does it differ from a File Format (e.g. MPG)?

I'm so confused... what is the difference between an audio/video codec (which apparently is a shorthand for "encoder/decoder", kind of like how "modem" is really "modulator/demodulator") and an ...
51
votes
10answers
40k views

Moving users folder on Windows Vista/Seven to another partition

When I format the computer and reinstall Windows, my first step is move the "my documents" folder to another partition. In Windows XP it wasn't enough because the desktop folder and another user ...
47
votes
21answers
91k views

How can I mass rename files?

I've got a bunch of files named with a the pattern 99 - DescriptiveName.txt and I'd like to remove the number from the front so I just have DescriptiveName.txt. How can I do this? Can I do it from ...
47
votes
8answers
18k views

How do I delete a 'locked' file?

On Windows XP, when I try and delete a specific file it says: Cannot delete blah.blah: Make sure the disk is not full or write-protected and that the file is not currently in use. How can ...
123
votes
8answers
78k views

How do I turn off Modern UI and get the old Start Menu back in Windows 8?

I just bought a new Windows 8 laptop, but I want to get rid of the new "Modern UI" Start Screen, and get the old Start Menu back. How do I do this?
31
votes
10answers
53k views

How can I tell what RAM will fit my computer?

If I want to add more RAM to my computer, how can I buy something compatible? What kinds are there? How do I determine which kind my computer will accept and how much I can add?
30
votes
10answers
172k views

How can I make my IP address appear to be from another country?

How do I make it appear that my IP address is coming from one country while I'm located in another? I live in Germany and some websites (like Hulu or Youtube) don't work because my IP isn't in the ...
293
votes
4answers
366k views

How can I get the same SSID for multiple access points?

I need to upgrade my existing wireless infrastructure and this time I want 2 access points to cover my house, since I get blind spots no matter what with a single AP. I have physical cabling to my ...
31
votes
10answers
5k views

How can I keep folders synchronized between several machines over my home network?

Like many people I take quite a few photos, and also like quite a few people I don't back up as frequently as I should. What I'd like to be able to do is automatically synchronize my "to be backed ...
98
votes
10answers
56k views

How do I set up SSH so I don't have to type my password?

How do I set up SSH so I don't have to type my password when connecting to a host?
28
votes
8answers
8k views

Booting Linux off USB pendrives

Booting a Linux system off USB Pendrives is one of my favorite things. On a laptop we have the following advantages, The Harddisk can be shutdown and that reduces power consumption (hdparm) The ...
20
votes
3answers
16k views

Assign a shortcut to running a script in OS X

Does OS X provide an easy way to bind key combinations to commands which are typically run on the command line? For example, is there some way to assign ⌘ Cmd+L as a global shortcut for ...
227
votes
10answers
168k views

Is there any 'sudo' command for Windows?

I always work on a non-administrator account on my Windows computer. Sometimes I need to install programs which requires administrator access. As I mostly use the Windows command prompt, is there a ...
47
votes
10answers
96k views

Free way to clone HDD to SSD?

Is there a free way to clone a full Windows 7 installation from HDD to SSD? (The free part is important, I know I can pay for Acronis True Image.) SSDs are usually much smaller than HDDs which ...
20
votes
4answers
77k views

How can I enable onboard graphics AND dedicated card simultaneously?

My PC (Compaq Presario) has an onboard Intel 3100 which is pretty lame wbut would be useful for testing on, or a 3rd monitor. I've then got a nVidia PCIx card installed. I can't seem to find a way to ...
52
votes
7answers
109k views

Using cd Command in Windows Command Line, Can't Navigate to D:\

This may be a stupid question, and I think I have looked elsewhere to find the answer... Might be a path issue, but when I open the command line and type from the C:\>: cd D:\ I cannot get to ...
45
votes
28answers
67k views

How to force Windows to rename a file with a special character?

I have a song that Windows can't play because there is a question mark in the name of the file. "Where Have All the Cowboys Gone?.ogg" // as an example So I try to rename it and Windows complains ...
20
votes
5answers
57k views

How can I remap a keyboard key?

One of my laptop's keys has fallen off. Is there any way I can remap the key, to another key which I'll 'sacrifice' cause I never use it?
195
votes
3answers
57k views

Difference between .bashrc and .bash_profile

What's the difference between .bashrc and .bash_profile and which one should I use?

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