Problem with slower startup of XP windows SP3

Hello,
I have problem with start up when turn on the computer. The start up
sometimes works much slower than before, e.g. a couple days ago. It takes
even up to 10 min to finish, BUT sometimes works without problem. This is
for me unusual and without any logic. What is wrong?

I did several tasks to eliminate this, but uselless. I did as follows:
- scaning all computer with Panda AV Pro 2009 and also with Panda Activescan
2.0 several times,
- defragmentation of c with windows tool,
- scaning with ccleaner - erase all unneeded files (cca 800MB) and cleaning
the register.

As far as I know, the ccleaner tool is tested tool, perfect for home users
and without any problems.

Any advice would be very appreciated!

Thanks and regards,
Dean
.

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