Hi there all, I'm finally at my wit's end with this:
A guy on my course gave me his laptop to have a look at as apparently it went from "fine" to the unusable condition it's in now literally overnight (I'm no expert but I've helped fix a few friends/relatives computers in the past with the help of sites like this) - firstly, there WAS an instance of uTorrent on there when I recieved it, which I have deleted as recommended (and I also assume is the cause of the problem in the first place - although I'm unable to find any keygens or other obvious "warez" by searching on the drive, so aside from individually going through his private files I'll assume it's piracy-free...or was at least "cleaned up" before he gave it to me).
Right, basically the boot time now takes anything up to ten minutes and windows has hung and failed to boot on a few occasions, seemingly at random. RAM use is seemingly normal, but the CPU spikes at roughly 50% in intermittent but regular patterns (to clarify, the timing of when this happens is intermittent, but the pattern of the CPU spikes is regular and looks like a "sawtooth" wave) and the computer becomes essentially locked-up while this happens for up to ten minutes at a time. Firefox hangs and then asks to be restarted almost every time you click it - also, this morning on booting it said that the windows copy wasn't legit, but after running a system restore that issue at least has been resolved (he hasn't backed anything up, there seemed to be 3 restore points I could choose and I picked the most recent - they were all from about 3 days ago within 12 hours of each other - not sure if there were automatically generated as he didn't know what I meant when I asked if he'd already tried a system restore - when I get this working again I'll image his drive for him so either myself or someone else doesn't have to fix it for him again!).
I've seperately scanned with Malware Bytes, SuperAntiSpyware, IOBit Advanced System Care just to make sure, all of which came back as clean. Hijackthis wouldn't create a log file yesterday, but for reasons unknown, now will (maybe something to do with the system restore I did earlier today) - it still says that it can't access the HOST file though - there was an alarming amount of red-flagged entries when I passed the HJT log through an automated scanner, but I didn't wish to make any changes without first checking with folks more knowledgable than myself! (also, after reading a few posts on here, it seems HJT isn't as relavent nowadays anyway)
The requested "attach.txt" and "dds.txt" should be attached.
Apologies for the long rant, I incorrectly assumed this would be a quick and easy fix and I'm just frustrated at my own lack of know-how.
P.S. - if there is anything on the logs that shouldn't be there that I've missed (piracy or otherwise) please just tell me and I'll delete it immediately - I've no interest in helping someone break the law.
Thanks in advance X