XP, IE8 and Firefox are OK, of course. Vipre is a well-know antivirus. Don't know about Advanced System Care, but I see it already IS a registry cleaner, among other things. So I see no reason at all to need another on.
If fact, we recommend using none at all, including ASC.

We can only help with errors if you give enough information about them. That includes:
- the full and litteral (without typos) text of the error message, including any error number it shows
- telling when you get that error
Data transmissins seems to be related to using a modem. So please tell about your Internet connection also.

Kees

Kees