Why does Windows XP Pro take so long to startup?

It takes up to 3 minutes sometimes. This is when the xp logo is on the screen saying its loading. I have a pretty good computer. I disabled most of the start up programs and checked and removed spyware via spybot sd and adaware. I have no virus according to Avast. I also used Ccleaner to clean the registry.

System-

CPU- AMD Athlon 64 X2 4200+ 2.2GHz

RAM- Patriot Signature Series 1GB (2 x 512MB)

Motherboard- ASUS A8N-SLI

GPU- GeForce 6600LE 128MB

Hard Disk- Seagate Barracuda 160GB 7200 RPM

Windows XP Professional With SP2

Why does Windows XP Pro take so long to startup?microsoft frontpage

How to Speed Up Windows Boot Time

http://www.pchell.com/support/how_to_spe...

http://www.extremetech.com/article2/0,15...

http://www.pcguide.com/opt/opt/bootSpeed...

http://www.neowin.net/forum/index.php?sh...

disable unnecessary services

http://www.blackviper.com/WinXP/servicec...

http://www.extremetech.com/article2/0,16...

Why does Windows XP Pro take so long to startup?windows vista home premium internet explorer

coz it could be fragmented. try auslogics
micrsoft claims that professional is faster than home edition. im not so sure bout that but i have an athlon 64 x2 4400 processor, 3gb of ram and xp pro. it boots in like a minute at most. maybe ram. i removed 1 gb from my pc and it was noticabely slower at startup. maybe RAM.
xp sometimes has problems like this. it is very slow with everything.
Windows is a pig, and always has been.