What a messy and dubious un-installation. Update: Once I did "End-Process" in Task Manager, I was able to delete the ISUSPM.exe file. FlexNet Connect Transform CX with Automated Electronic Software and Firmware Updates, In-Product Messaging and Analytics. The most popular versions among the program users are 6.1, 6.0 and 1.0. Click the "Disable" button to prevent the utility from launching again the next time you restart or power on your computer. Flexera Acquires Austin Software Startup Backed by Mark Cuban. Premium Content You need a subscription to comment. XP PRO SP3. The issch.exe process is part of InstallShield Update Service Scheduler of Flexera Software, LLC