Error 6 invalid descriptor

Hello,

I no longer know what to do to connect to the internet,

Win 2000 Pro sp4 PIII 550 E 256 Mo ntfs

Fortunately, I have a second PC PII 300 192 Mo also with Win 2000 Pro sp4 ntfs, with which I can currently contact you.

I am on the same telephone line as the malfunctioning PC and the dial-up connection is working fine.

I had ADSL access through Cegetel (3 weeks of working without issues, perfect installation), but now, I've lost the ability to connect. I called the hotline, but after 30 minutes, nothing progressed.

So I thought, let's try dial-up, and there, surprise, no connection either.

"Error 6 invalid descriptor"

I have retyped the username and password for my dial-up accesses (Free, Cegetel) many times, same error.

I want to avoid formatting because the rest is working fine, but I did launch a repair of Win2000, reinstalling Service Pack 4 and IE 6.0 from the Cegetel CD.

Still the same, error 6

So, is formatting mandatory to get out of this mess??

Thanks for your replies.