I installed the 4.3 on an USB Stick first for to test in my laptop Acer Aspire 4752 and it worked. The working is very fast. Also Ethernet is auto detected and works well. What didn't worked is: Camera: Camera was detected but didn't show any picture, or to be precise, just a black picture! WiFi: It ask for the WEP Key and keyin: NOTHING! Bluetooth: didn't worked. So, I'll install on HDD and see what here will work and what didn't! I didn't had that problems in 4.2.3!
In meantime I installed 4.3 on it's own HDD and had the same problem. So, I'll be back to 4.2.3 which were working well incl. WiFi and Camera!!