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Okay, so, my own rig running on Windows 8, built in October last year.

Specs:

Intel Core i5 3790k

16GB RAM

AMD Raedeon HD 7700

250GB SSD

1TB HDD

The list of issues:

  1. Chrome's search engine keeps annoyingly changing to Yahoo. And not the fake AdWare Yahoo, the real uk.yahoo.com search engine.

  2. Audio drivers keep messing up. As soon as my little sister turns on the Sims, the audio doesn't work anymore "No headphones or speakers are plugged in". I had to uninstall the driver, go into BIOS and disable the audio driver, restart BIOS and enable the audio driver then reboot my PC.

  3. When the audio driver messed up for the second time, I did the same thing but when booting up my PC, the keyboard and mouse didn't work. Hence, the USB drivers were also being messed with.

Windows Defender, the anti-virus that came with Windows 8, is not detecting any viruses.

I ran the Windows CD I have and ran the auto-fixer thing, and it just boot up working fine. What should I do to ensure this doesn't happen again?

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closed as too broad by Ƭᴇcʜιᴇ007, Jens Erat, Kevin Panko, Moses, Doktoro Reichard Jul 7 at 21:29

There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question.

    
As to number 1: that doesn't sound like a virus, but more like you downloaded and installed a program carelessly and set the Yahoo site as your default site. –  Xavierjazz Sep 21 '13 at 20:05
    
As to anti-virus, Microsoft Security Essentials is a free AV from Microsoft. I believe that since they designed the operating system, probably they understand how to protect your computer best. –  Xavierjazz Sep 21 '13 at 20:06
    
The remaining two points seem to be driver related issues. My recommendation is to reinstall them. –  Doktoro Reichard Sep 21 '13 at 23:09