Windows 8.1 on the go ver slow.?

I created a portable vrsion of windows 8.1 on my 16gb san disk flashdrive usng wintousb. I know it isnt prper windows 8.1 but it says it I a version of it. Anyways the flashdrive is usb 2.0. I mainly boot it off a desktop with 64 bit windows 8. The windows 8.1 flashdriveis 32 bit. It runs very poorly and slowly. It takes about 5 minutes to boot than 3 to login. Then for about 10 minutes I cant do anything bcause it freezes up. Afterthe 10 minutesit works pretty good but with a little lag but thats ok. Today I tried the flashdrive on an old dell inspiron d610 and it booted up really fast and didnt freeze at all. It only took about 5 minutes to boot and login adi didnt have to wait the 10 minutes to ue it. On the desktop I use a usb 3.0 port becaue its all thats avaliable on the laptop I used 2.0 because all that was avaliable. Why did it boot so much faster on the older laptop? Why does it lag so bad on my desktop. I unerstand the diffrence between 32 and 64 bit operating systems but could thelag be from booting on a 64 bit machine and not using all the memory? Im very confused right now and would really like to know why? I do think it may be that the windows 8 special bios boot settings. I disaled secure boot and enabled uefi boot sources though and enabled virtua pc. All settngs not avalible on the old laptop