Possible post-virus "solving" problem

Hello, I’m having a spot of bother with my PC (Win7 64) and would appreciate some help.

My computer was running slow, and every now and again it would randomly attempt to restart and log off, I stopped both attempts. Two nights ago, however the colour scheme or whatever its called went from normal to “Windows Basic” or whatever its called (times two, I know).

After speaking to a few of my tech-savvy friends, I turned the PC and went to bed, the following morning I started the PC and did a full systems scan. And there it was, four and a bit hours later of scanning, it found one infected file, opengltest.exe. (Note : I saw something on avast forum today about this, I do have steam) After moving to chest I got the usually “Do bootscan now?” and clicked yes. Around 5 hours later it found 2 problems.

f_00012e from Torch, the virus is/was : NSIS:Solimba-B [PUP]

flvmplayer.exe, same as above.

Not fully understanding what was which, I attempted to repair the files. And as always it failed, so I moved to the chest.

After the bootscan, the PC restarted and I noticed a black screen with something at the bottom right hand corner before the desk top and window’s welcome screen

“Windows 7”
“Build 7061*” (*Forgive me, can’t remember. Its the most up to date one)
“This version of Windows is not genuine” And it is genuine, I remember it coming with the PC and doing the verification.

But it booted up regardless, it was fine

Today however, different story. The PC booted up, little longer than usual but meh.

Then disaster struck, I clicked the avast pop up and I had a powercut (Although, I’m sure this is a simple concidence, I mean… What virus causes a house-wide powercut)

The PC rebooted and I was greeted with the black and white screen of asking me to do a scan of my C:. I panicked and denied it, it took a while and started normally. After the computer had finished loading everything, I was greeted by a “Windows trouble shooter” icon on my task bar, saying aVast! is turned off and I should turn it back on, I left that message alone incase it was rigged to virus me (Paranoia, hurray!) and started avast via Windows menu. It was fine and working normal, and I’ve now turned on “Public” mode for extra security as well as exiting dropbox and steam. Is this just bad luck or has something worse happened?

Note : I have now un-installed torch as of last night.

Initially I would suggest a sfc scan to verify windows files

Open an elevated command prompt

Go Start > All Programs > Accessories
Right click Command Prompt and select " Run as Administrator"
In the black box type the following command and press enter, reboot on completion

sfc /scannow

Let me know what problems are still there