Yep same here. I uninstalled and reinstalled Impulse the first time (a few says ago) it fixed it, then Ive got it again (just installed Demigod, which wants an update). I get it nomatter when i try to update (on load, through popup, or manual check) and have kept impulse updated regularly.

The error reads:

Decompression error.

(Impulse (Main))

I would note that my system has impulse installed on the D: drive, Demigod and GCII:EU on D:, Objectdock and Fences on C: with the Demigod Demo. Which may or may not have anything to do with the problem

Thanks,

Gauss

Reset data should take care of this, if it does not, an uninstall and reinstall from here will: http://www.impulsedriven.com/impulse_setup_full.exe

Should there continue to be a problem, write us at support@stardock.com