Been meaning to post this for a minute and I have seen this come up a lot around here lately so here is IMO the easiest way to clean up your computer, all these apps are free and are good to have on your computer or USB even just in case:
1. AVG for free
http://download.cnet.com/AVG-AntiVirus-Free-2014/3000-2239_4-10320142.html
AVG is anti virus, it has active protection on your computer,email, & browser, which means it doesn't wait until you tell it to run to protect you it protects 24/7, easy on your computer too as far as resources
2. Malwarebytes anti malware
https://www.malwarebytes.org/downloads/
Best Malware scanner best of its kind, make sure you run this at least once a month and do all the proper updates to it
3. Spybot Search and Destroy
http://download.cnet.com/Spybot-Search-Destroy/3000-8022_4-10122137.html
Anti spyware tool, i run this every two months or so , again another one that is constantly getting updated
4. CC Cleaner
https://www.piriform.com/ccleaner/download
If you ever need to do a quick history/registry cleaning of your computer this is the best tool out, very lightweight program i run this every 2-3 months
5. Hijack this
http://download.cnet.com/Trend-Micro-HijackThis/3000-8022_4-10227353.html
I use this program when people tell me there computer is really having issue and running the other programs i mentioned aren't working, this scans your system and then provides you with a log of what is causing the problem, it will create text file which them you can post on here http://www.hijackthis.de/ This website will very plainly tell you what to keep and what to delete.
These programs are the only thing you need. If your computer is having issues with malware,spyware and viruses what you should do is disconnect it from the internet and run all of these programs in the order i just posted them in. This will take a while especially if your computer is severely infected. #1 & #2 each could take up to 45 min to.
I also highly recommend to run this TWO times back to back if your computer is crippled really bad
I have not come across a computer i could not clean using these programs in this order.
1. AVG for free
http://download.cnet.com/AVG-AntiVirus-Free-2014/3000-2239_4-10320142.html
AVG is anti virus, it has active protection on your computer,email, & browser, which means it doesn't wait until you tell it to run to protect you it protects 24/7, easy on your computer too as far as resources
2. Malwarebytes anti malware
https://www.malwarebytes.org/downloads/
Best Malware scanner best of its kind, make sure you run this at least once a month and do all the proper updates to it
3. Spybot Search and Destroy
http://download.cnet.com/Spybot-Search-Destroy/3000-8022_4-10122137.html
Anti spyware tool, i run this every two months or so , again another one that is constantly getting updated
4. CC Cleaner
https://www.piriform.com/ccleaner/download
If you ever need to do a quick history/registry cleaning of your computer this is the best tool out, very lightweight program i run this every 2-3 months
5. Hijack this
http://download.cnet.com/Trend-Micro-HijackThis/3000-8022_4-10227353.html
I use this program when people tell me there computer is really having issue and running the other programs i mentioned aren't working, this scans your system and then provides you with a log of what is causing the problem, it will create text file which them you can post on here http://www.hijackthis.de/ This website will very plainly tell you what to keep and what to delete.
These programs are the only thing you need. If your computer is having issues with malware,spyware and viruses what you should do is disconnect it from the internet and run all of these programs in the order i just posted them in. This will take a while especially if your computer is severely infected. #1 & #2 each could take up to 45 min to.
I also highly recommend to run this TWO times back to back if your computer is crippled really bad
I have not come across a computer i could not clean using these programs in this order.
I stopped doing it though, if you're not going to listen, I'm not going to waste my time. Same with network/wireless advice.
....i usually do this stuff anyway now tho cuz i got sick of taking that L and having to reinstall windows 
....turned that shyt on a few months bak to get the last of the porno piff i had on it (
) shyt took like 20min to start up 
....had to look at the laptop im using now and say "never again breh never again" 
