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And by extremely slow I mean startup time of the order of 5-10 minute. And all the applications make me wait. Sometimes an application does not even start properly. Basically it's unusable for any realistic work. Funny thing is that cpu usage in the task manager is constantly <10%. Memory consumption is 60-75%. How is it so slow?

My first guess is antivirus but how do I uninstall it when the computer is unusable in normal mode?

Normal mode there are 80+ processes running while in safe mode there are 30- processes running.

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It sounds like you are infected with malware. How long as this been going on? –  Ramhound May 21 '12 at 15:32
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2 Answers

up vote 2 down vote accepted

In safe mode click on the start menu and type msconfig, then enter. Select Diagnostic mode.

All AV and other services and startup programs will be disabled when you boot into normal mode.

You may then reenter msconfig and selectively check items you want to boot under the Services tab and under the startup tab. This will allow you to determine the program causing it, you may then uninstall it.

NOTE: your computer may not work as you expect if you have certain services disabled under msconfig, so if you have issues you may have something disabled that your computer needs!

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Here's a couple of tips for using this method. First, on the Services tab click on the Hide All Microsoft Services option, since it's unlikely to be any of them. Second, initially only turn off the first half of what's left on the Services or Startup tabs, reboot, and check the speed. If it's OK, then it was one of the ones you turned off, and you can repeat the process by only turning off half of them and retesting. If it's not any faster, repeat the process reversing which are on and off. This will generally allow you to determine the offending service (or startup program) more quickly. –  martineau May 21 '12 at 19:07
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You should be able to run the uninstall from safemode. How ever this may not resolve the problem. I would recommend running http://www.malwarebytes.org/ to do a full scan of your system and remove any other programs that may be running in the background. You may also run msconfig from the run command box, then look at the startup tab, remove any programs that you are sure you donw need. http://www.netsquirrel.com/msconfig/index.html. Windows safe mode only runs with the minimum programs needed to start windows which makes it super quick.

Let me know how it goes.

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