i already have one activated but my 2nd one which i restored due to a memory card problem cant activate and i cant use the qcma ,any option?
That shouldn't be a problem I don't think or, at least, nothing wide-spread.ok further pluging it with 3 other pc the ps vita was not detected in control panel and nor in zadig, all occured after vitashell update to 1.51 and that make me thinkling that this had a bug and disabled something in usb,is there a way to restore usb function? to normal i did found another 2 person with same problem
I don't think it will work, the act.dat is unique to every console as it contains the idps of each console. So merely transferring act.dat won't workI'm not 100% sure on this, but you might be able to take the act.dat from your first Vita and transfer it to the other along with some registry files that might activate your Vita.
vd0:registry/system.dreg
vd0:registry/system.ireg
tm0:npdrm/act.dat
Note that this is experimental, I'm only basing my assumption that this would work because of an old method of swapping accounts on the same memory card. If it doesn't work, then there's nothing you can do without a PS3.
Also, QCMA doesn't need an activated Vita to be used, just a PSN account linked (which is not the same thing as activation). It sounds like when you restored, you didn't actually setup a PSN account during first time setup. You can do so without updating, so restore again and add the PSN account if you haven't beforehand.