I had to do a system restore on my computer this week. (I'm an idiot and forgot my password)

I've downloaded Bearshare again but it's running differently to how it used to do.

After about half an hour with bearshare running in the background, my internet connection cuts out. Trying to reconnect doesn't work, I have to restart the computer.

I've tried using the internet without bearshare running and it doesn't cut out at all.

Does anybody know what could be causing this?

Thanks