If you can still install software then install
Kaspersky Antivirus(trial),
AVG AntiSpyware(free),
SuperAntiSpyware(free) and
Malwarebytes' AntiMalware(free). Just dont enable realtime protection for avg, superantispyware and malwarebytes antimalware.
Update them and scan in safe mode in this order:
KAV > SAS > MBAM > AVG, fix whatever is detected.
After that scan with
HiJackThis(free) and post the scan log here. Once the virus is gone, its not difficult to fix control panel, run, task manager etc.
You will have to uninstall your current Panda antivirus, Mcafee Antispyware etc. before installing KAV. If you want you can reinstall them after the problem is solved.