Problems Paying with PayPal?
PayPal Problems arise when there are other users on the same PC with another PayPal account, or the email used on the website is different from the Paypal account.
If there is a problem with PayPal accepting your details, the best thing to do is to remove the Cookies that are on your PC - these tell online websites who you are and remember log in details.
To remove the cookies it is best to Google "remove Cookies from your computer" and check out a couple of the answers.
Remove the cookies, restart your browser and then try buy some products and checkout with PayPal.