<Free Port Scan> note: lots of info here as well

(Shields Up) https://grc.com/x/ne.dll?bh0bkyd2


<Ports Guides>

http://portforward.com/

http://www.practicallynetworked.com/sharing/app_port_list.htm


<Free Online Anti Virus Scans>

http://housecall.trendmicro.com/

http://www.f-secure.com/

http://security.norton.com/sscv6/default.asp?langid=ie&venid=sym

http://www.pandasoftware.com/activescan/
 

<Free Anti Virus Software including Update Subscription>

(AVG) http://www.grisoft.com/doc/40/lng/ww

(Avast) http://www.avast.com/


<Spyware detection and Removal>

(AdAware) http://www.lavasoftusa.com/

(Spybot) http://www.safer-networking.org/en/download/index.html


<Windows XP Services>

http://www.blackviper.com/


<Tweaking & Repair Sites> note: many of these sites contain a Guide & Article section(Read/Read)

http://www.frozencpu.com/links.html?id=LHuQReMG

http://www.tweaktown.com/

http://www.pcguide.com/

http://www.tweakhardware.com/

http://www.neowin.net/

http://www.tweakguides.com/

http://www.pctechguide.com/

http://www.majorgeeks.com/

http://arstechnica.com/guides.ars


<Over Clocking>

http://www.overclockers.com/

http://www.extremeoverclocking.com/
 
http://www.g4tv.com/screensavers/features/2919/Overclock_Your_Processor.html

http://www.tweaktown.com/document.php?dType=guide&dId=713


<Free PC Scan> note: scans pc for problems

http://www.pcpitstop.com/


<Drivers>

http://www.driverguide.com/
 
http://www.nvidia.com/page/home.html

http://www.ati.com/

http://www.viaarena.com/?PageID=2

http://www.soundblaster.com/drivers/

http://us.hercules.com/support/index.php3


<bios descriptions>

http://arstechnica.com/guides/tweaks/bios.ars/1


<how to build a pc - step by step>

http://www.mysuperpc.com/


<How to apply thermal paste properly>

http://www.arcticsilver.com/arctic_...nstructions.htm


<list of 99.9% of file extensions and what opens them>

http://filext.com