Help!! Newbie here!!

Sorry if this has been already posted…I just got my PC fixed and my brother’s friend put this software on my Windows 7. I am having trouble opening anything i download. I downloaded Firefox and it said it was a corrupt file…but i checked it said no issues with it. Also, I cannot save any picture as my desktop background. Can anyone help??

What was the problem with the computer that needed repairing

the whole thing died, I’m not too sure but he installed everything on it and got it running again. I can’t get a desktop pic i tried ginipic does nothing. And I want firefox too :-\

Are you able to access safe mode with networking ?

Reboot the computer, immediately press and hold F8
Does a menu come up ?
If so select safe mode with networking

THEN

Download OTL to your Desktop
Secondary link

[*]Double click on the icon to run it. Make sure all other windows are closed and to let it run uninterrupted.

https://dl.dropbox.com/u/73555776/OTL_Main_Tutorial.gif

[*]Select All Users
[*]Under the Custom Scan box paste this in

netsvcs
BASESERVICES
%SYSTEMDRIVE%*.exe
/md5start
services.*
explorer.exe
winlogon.exe
Userinit.exe
svchost.exe
winsock.*
/md5stop
CREATERESTOREPOINT

[*]Click the Run Scan button. Do not change any settings unless otherwise told to do so. The scan wont take long.
[*]When the scan completes, it will open two notepad windows. OTL.Txt and Extras.Txt. These are saved in the same location as OTL.
[*]Post both logs