I use Win 10 and I have 8 Gm Ram
After updating to 2.7.9.0. my desktop PC became extremely slow / the mouse pointer (cursor) danced on the monitor / the sound of movies played back from YouTube or with VLC cracked and stuttered.
I took a long time to find out that if I used Ctrl+Alt+Del to disable Shareaza completely that my desktop PC returned to normal immediately.
So I uninstalled 2.7.9.0. and I re-installed 2.7.8.0 and everything is again OK
I hope this info will benefit other people