Unfortunately this is probably not going to be an easy answer - as there is a massive number of things that could be causing this problem, both internal and external. I'd like to summarize some advice on how you might go about finding the culprit as I use the same setup personally and I imagine its one of these.
- Check for updates on your PC. Specifically windows updates, changes to your firewall settings, virus protection etc. These could cause it to be going slower.
- Check for updates on SVN/etc's end. Its always possible they updated their side of the system and its causing you problems.
- If anyone else has access to the system, ask them about changes they made to help find possible causes.
- Check the repository itself, do you notice anything that should not be there (such as extra branches, additional files, etc)? It's possible someone has been committing information as duplicate/etc that is causing it to be much larger then needed.
- Check your general connection. Since you did not mention this I assume your connection is fine other then the SVN connection?
- If all else fails, attempt a full reinstall of the products. This generally cleans up anything that goes astray.
If what you said is true, I would suspect something on their side that is effecting you negatively. Hope this helps give you some ideas.
Additional Thought
Check your system for viruses/spyware. Start a cleanup process and fix as much as possible (drivers, windows update, virus scans, defrag, etc). Basically hit every possible issue you can and clean as much as possible. Its possible its something silly that should not be effecting it - and by doing these changes it might fix it.
