It may be some undetected malware, an owner that never heard or used canned air, etc.
You may also find them trying this over WIFi. Get wired for now.
Sorry but it's not anything specific that I can tell from your post. Try the usual canned air and wired.
As a last resort I thought I'd just ask for help.
Basically my laptop (Fujitsu, about 4-5 years old, running Windows 7, Intel(R) Pentium(R) CPU, 4GB (3.8GB available), 64-bit OS) is screwed.
It used to run fine and I would watch Netflix with no trouble but recently it just freezes, constantly, like, I can only watch a few seconds of something before it starts to jump and then ultimately freezes which is frustrating beyond belief. I also get the occasional pop up. As well as this it seems to completely disregard my choice of homepage (I use Chrome) and always starts on a random page probably related to a virus that is installed.
So far I have tried going through Netflix's recommendations for this problem, no use. I have run every virus/malware scan I can think of (I have Avast Free Antivirus, I paid for the Grimefighter thing too), I tried Adblock, Housecall and most recently Malwarebytes (this found over 300 potential risks but didn't solve the problem). I changed Netflix's settings so I'm not watching in HD. I uninstalled and reinstalled Microsoft Silverlight. I also ran a Microsoft Safety Scanner which took over 12 hours and didn't help, that is time I won't get back.
I regularly clean up temp files and run disk checks, my laptop has almost nothing on it because I don't even use it to play games.
I don't have any other programs running in the background, just occasionally a tab with my emails or something.
Please, for the love of god can someone help me? You can probably tell I don't know a whole lot about computers. I also don't want to spend any money if I can help it. Help me before I end up throwing a shoe at it.