After killing the process of Aero (wich had a memory leak, it was reaching 1 GB by itself and using all of one core).
I restarted the Aero process only to be greeted with something like "your performance analisis was reset" (all my windows7 performance scores were reset)
also , aero glass dissapeared from the Personalize.
I tried the technique of turning off the aero service (desktop window manager session manager ) and turned it on again, and then re-ran the performance (getting a 5.4 due of lousy old hdd, the rest are between 6.5 and 7.5 ).
but after a few restarts, the AERO glass option is still missing, how do I recover it?
Windows 7 Ultimate
Intel Kentsfield @ 3 Ghz ( Q6600 )
GA-X48-DS4 ( Gigabyte )
4 x 2 GB ram DDR 800 ( 8gb in 4 modules )
2x Western Digital ( 160 + 500Gb )
1x Seagate ( 250Gb )
Sound Blaster Audgigy 2 zs
Sapphire HD 3870 512Mb
Viewsonic G90F + AcerAL2216W