1. De-Activate Self-Defence Feature of the Antivirus.
2. Exit the Antivirus by right Clicking the tray icon and hitting Exit.
3. Go to Start > Run, type regedit and click OK. Navigate to the following path in the Registry 
Editor: 
HKEY_LOCAL_MACHINE\SOFTWARE\KasperskyLab\protected\AVP9\environment - for x86bit machines
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\KasperskyLab\protected\AVP9\environment - for x64bit machines
4. Find : "PCID"="type_HERE_anything_YOU_want_ONLY_to_BE_unique_EVERY_month"
5. Edit PCID every 30 days with something unique.
6. Start Kaspersky , Re-Enable Self-Defende Feature.
7. Activate Trial again.
8. Update.

P/S: If Self-Defense or any other thing might happen and won't let you edit the PCID String , use 
Safemode to do the Job.

important note 1>make a registry backup
2>do it on your own risk

Here is Kaspersky 2010 and 2011 [Anti Blacklist Crack]. It prevent blacklisting the kaspersky keys.
http://www.mediafire.com/?omz7xcnorlv6y9g