You should be fine. You can always roll back to IE6 by doing an uninstall on IE7. It rolls back automatically. On BT issues this is the most common and is easy to fix.
BT and some NTL or Blueyonder broadband users have experienced error message like "SmartBridge Alerts:-Alert BT Help Notifier.exe (or MotiveSB.exe for NTL or IST for Blueyonder) Entry Point Not Found The procedure entry point GetProcessImageFileNameW could not be located in the dynamic link library PSAPI.DLL"
This relates to the BT ( NTL, Blueyonder) desktop helper. The simplest way to deal with it is to uninstall it if you do not use it or take it out of your start up list. The program name will be something like Motive Communications or Motive SB.
Alternatively, 1. Navigate to the installation location for SmartBridge via My Computer (\Program Files\Alert BT Help Notifier.exe (or Motive SBexe. for NTL or IST\SmartBridge for Blueyonder)
2. Find PSAPI.DLL and rename it to something like PSAPIOLD.DLL
3. Reboot the system
The program will find the new PSAPI.DLL in the \Windows\System32 directory and function normally.
To disable a start up program click here
Or, if you have Spybot Search and Destroy use their start up control tool.