i cannot open wlm, get error0x8e5e0247 wlm could not be started closing wlm your calendar contains corrupt data that is forcing wlm to close

I took my Dell computer to a local shop to have some work done.They called me and asked for the reinstallation disk to reload windows so of course I lost WLM. The computer a 64 bit os.I am running Windows 7 Home Premium. Themorning I took the computer in WLM worked fine.I have tried several of the suggestions found on microsoftanswers.com with no luck.The first one was to right click WLM icon and run as administrator.Then go to control panel and choose user accounts. Next it says to click on change user account and control settings. On my computer I don't have a change user account and control settings to click on. The other suggestions I had no idea how to do.Please help!!!