So i thought it would be a good idea for people to list free programs they know are helpful in removing virus, spyware and keeping your pc running good, so here are a few i know of.
Firstly a great defrag program that is quick and free also if you are vista you know the defrag sucks so try this
http://www.auslogics.com/en/software/disk-defrag its free

now for a very good spyware killer it catches things other programs cant find
http://www.malwarebytes.org/ again its free
Another great free anti spyware program
http://www.superantispyware.com/ there is a free version and a paid for version the paid for version offers real time detection.
CCleaner is a freeware system optimization, privacy and cleaning tool well worth checking out
http://www.ccleaner.com/
A great anti virus is AVG and there is a free version
http://free.avg.com/download-avg-anti-v ... n_free_670
If you have a pc that is barely capable of runing your games then give this ago gamebooster
http://www.iobit.com/gamebooster.html
All the above work on most operating systems including vista 64.
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my sig
Intel Core 2 Quad Pro Q6600 "Energy Efficient 95W Edition ocd to 3.15 ghz
Abit IP35 Pro (Socket 775) PCI-Express DDR2 Motherboard
Crucial Ballistix 4GB (2x1GB) DDR2 PC2-8500C5 1066MHz
EVGA GeForce 9800 GX2 "SSC Edition" 1024MB GDDR3
CoolerMaster Stacker 832
Coolermaster 700W ATX2.2 Modular SLI Compliant PSU
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