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Hi, thanks for all the replies. Firstly I had this PC built by reputable firm and the chap there put the Windows classic shell ( thought it Win 7 Shell as that's how this performs like Win 7 but thanks TC for putting me right) had it put onto it for me because I didn't like Win 8 so it's a legit installation methyl. I hope I don't have to uninstall etc as I have no confidence in myself for undertaking much techy stuff on my own so would have to go back to blokey for that.
I always clear my history, cookies, cache et al Gromit even during use and always after so I don't think that is a problem and especially as it's only Asda shopping site that won't work properly. I don't know if it works in any other browsers because I haven't downloaded any and wouldn't know where to begin with that unfortunately.
Thanks TC for the info on your having Classic shell and the upgrade going ok to 8.1 that does at least make me feel easier that it could be ok here if I did it. I just wondered if there was some "quick fix" for the Asda site not working and in fact why it wasn't. I know this PC doesn't like this site, as it runs slow most times and locks up et al when I'm on here....think it could be to do with all the ads, though I have pop up blocker set to on all the time.
Thanks for your replies everyone I really appreciate it.