Not a single idea.

Try:
a. Reinstall Flash into IE.
b. Download Mozilla or Firebird as an alternative browser and install Flash into that.
c. Run the usual scans (housecall, adaware, spybot)
d. Download ieradicator, then eradicate IE and use Mozilla to install it again from microsoft site.

If you need help on any of these suggestions, post again or search on these forums.

Kees