Intermittent loss of Internet

[Kapsix]

HI,

This is my first post and I hope I can get some help.

First of all, I can generally get on the internet & Email, but after about 10-15~ minutes I lose connectivity.
I then have to do one of the following:
1.) restart the computer (sometimes this works)
2.) reset my IP on command prompt (generally this works)
but again, after several minutes, I lose connectivity.

What's been done:
I contacted my ISP (I have a DSL line), they checked out everything and everything on their end is OK, however, for customer satisfaction, they replaced my modem with a brand new one, as of yesterday,
but, alas, I continue to have the same problem.  Before the original installation of the DSL, I had my house
rewired, so everything up to the computer is OK.

I have a Dell XPS-600 about 4 years old
Windows XP Service pack 3 (I use auto updates)
Dual processor, Pentium D 3 G Hz
2 Gig Ram
250 Gig HD
I believe all my drivers are current and up to date.

Any suggestions, short of buying a new computer would be greatly appreciated.

Thanks in advance,

KapSix

[Allan]

Did this just start or has it always been this way?
Try a "clean boot" (msconfig - selective startup - uncheck everything). Does it still happen?

[Kapsix]

Allen,

Thanks for the speedy reply, the only thing I have on selective start up is my virus suite.
I have always been running my comp that way and yes it continues to happen.

[Allan]

Did this just start or has it always been this way?
Try a "clean boot" (msconfig - selective startup - uncheck everything). Does it still happen?

[patio]

Do you have DSL filters on ALL phone lines ? ?
I'll bet the phone is ringing when this happens...