Giving more info may help, Regarding these entries:
DyFuCa, ISTBar, SideFind, XXX.toolbar and Hotbar
These are getting Blocked by MSAS's real time protection
when I tested them yesterday, In fact it was impossible
for me to run them while real time protection was enabled
it kept giving the same red pop-ups and wouldnt continue
in running the files untill I disabled real time
protection,
It finds the files easy enough once installed and cleaned
them of my system without problems,I did have to close
all open Browser windows to complete the clean up but it
still removed them, I suspect you have a trojan
downloader on your system but if you can give more info
on what you are seeing it would help.
Andy