Check this page of Microsoft http://support.microsoft.com/kb/935796 entitled “Information about programs that are known to experience a loss of functionality when they run on a Windows Vista Service Pack 1-based computer” before you allow installation of SP1. Make sure you check with the vendor of your program whether their software has no more issue with Vista SP1.
Today, the article shows below programs are blocked from starting after you install Windows Vista SP1
- BitDefender AV or Internet Security
- Fujitsu Shock Sensor
- Jiangmin KV Antivirus
- Trend Micro Internet Security
- Zone Alarm Security Suite
Then below programs do not run when you install Vista SP1:
- Iron Speed Designer
- Xheo Licensing
- Free Allegiance
Next is.. Programs that have a loss of functionality after you install Windows Vista SP1:
- NYT Reader
- Rising Personal Firewall
- Novell ZCM Agent
Please read the said article for more information. Make sure you are ready for Vista SP1. Be aware on known issues.