Hi, I'm running Windows Seven as Guest system onto Parallels latest version (Mac OSX 10.6.5). I must say that it's not so fast, so I've analysed the log and I've just found this rows: 06/01/11 09.25.04 kernel com_parallels_usb_control(0xffffff802142a700)::setProperties() PrlUsbLogLevel == 0 06/01/11 09.25.05 kernel prl_net: ipi on recv is enabled 06/01/11 09.25.06 kernel /drv/ HypHPC.c:221 Hyperswitch[0]. pBuf=ffffff80aa7d2000, piDbgLine=ffffff80aa7d2092, piDbgFunc=ffffff80aa7d2096 06/01/11 09.25.06 kernel /mon/ VPID base for this VM is 0x1 06/01/11 09.25.06 kernel /mon/ [Init] Mon (fffff00000000000..fffff00008c00000) (bin=16 mb, 2 vcpu, 2304 mb swap) 06/01/11 09.25.06 kernel /mon/ [Init] frame (00000000e8000000..00000000ea200000), lowMad (00000000ea000000..00000000ea200000) stubframe (00000000e8000000..00000000ea000000) 06/01/11 09.25.06 kernel /mon/ [Init] re frame (00000000ea200000..00000000eaa00000) 06/01/11 09.25.06 kernel /drv/ HypIoctls.c:770 Parallels hypervisor inited (cpus=2 hvt=VTX hvt status=Enabled vtd=NO phy=PAE lin=x64 mem=8192) 06/01/11 09.25.07 kernel /drv/ HypIoctls.c:198 mainRequest failed with status ffffffff 06/01/11 09.25.08 kernel /mon/ Efer mask = 801 06/01/11 09.25.08 kernel /mon/ Efer mask = 801 06/01/11 09.25.08 kernel /mon/ [rvi] Forcibly turning RVI off 06/01/11 09.25.08 kernel /mon/ [ept] Forcibly turning EPT off 06/01/11 09.25.08 kernel /mon/ [LoadMonitor] Monitor started( ipi vector=71 ) My answer is if there is something not working in my Parallels installation. Thanks a lot