Windows Vista and Slow Keyboard Response

Long time no entries, but finally I got so pissed up that I need to write one :)

I got Dell Inspiron 6400 laptop some months ago. The PC had factory installed Vista Business, so I was a little bit of worry how stable it is, but seems to work ok.

I started to install applications I used on my old XP PC. Everything went well and all got installed, excluding Stonegate VPN client which didn't have support for Vista.
I decided to replace that with OpenVPN since I'm not happy to Stonegate VPN client stability, not even in my old XP where it caused issues with the network every now and then.
I use the PC suite for syncing my mobile with PC, in XP I had Outlook, but in Vista I decided to use Windows Contacts which replaced the Windows Address Book from earlier Windows versions.

After initial sync, the PC started to act weirdly, when typing text output to screen got jammed, frozen what ever you want to call it, but letters appeared sometimes with three to five second delay.
This happened in all programs and it was very annoying when trying to write some document, email etc.

I tried to google, but no fix found. So I decided to remove PC suite which was the last program installed. No effect.
I continued to remove applications one-by-one, no effect.
I decided to re-install Vista since I was sure that I have somekind of virus in my PC which were not detected by antivirus software.

After re-installation Vista, everything started to work fine. I started re-install applications one by one, testing if the same issue appears again. Didn't happen. This time I didn't spend time with syncing my phone.

That all happened on last octobre and until today everything has been working fine.

Today I got new mobile and I decided to sync the contacts through the PC from old E50 to new Nokia 6110 Navigator. First I noticed that the PC Suite didn't support Windows contacts, so I needed to upgrade it to the latest one. After syncing the contacts from E50 to PC, the same issue happened again. Text started to flos slowly to the screen.

Ok, now I was sure that it was the PC suite since that's the only software I have installed today. I decided to make one test before removing the PC Suite, since it didn't help on last time. I removed all contacts from my Windows Contacts after syncing them to my 6110.

What happened, the issue was solved, text was flowing nicely and smoothly. I tested it again by syncing the contacts to the Windows Contacts from the mobile phone and I had same issue again. So remove the contacts again - no issues...

As a conclusion. If You have several contacts in Your Windows Contacts - it will generate typing problems in all applications.