Hi there, I need help.

I got an almost new 10G2 running on gingerbread and decided to install the EZ firmware in order to access Google Play.

after downloading Arctools, selecting firmware, selecting the correct one, checking the disclaimer box and hitting download I get this:

"error 95 – firmware file copy failed. archive file cannot be accessed. please check that your device is not mounted on a usb"

my device is not plugged into anything so I'm at a loss. 

I must admit I'm not hugely tech savvy (average 40yr old trial and error type learner) but I cant see that I've done anything other than follow the simple instructions to this point. Any help would be greatly appreciated. (UK based so may be time lag in replies)

p.s while blundering about randomly pressing things to 'investigate' the issue, I went into the internal memory and noticed a Kasty-ez zip file. pressing it gave me options to 'complete action with'. I chose 'using package installer' and I got: 'parse error. there is a problem parsing the packaging'. I have no idea if this is significant as i dont know what a parse is 

excuse my ignorance, cheers.