trying to install Corel photoshop pro x4 on my Ascer Aspire 5542-1462 laptop windows 7 64 bit. The site says that it is compatable with widows 7 64 bit and it even allowed me to download the trial for 30days. but now when I got to buy it as it is installing it I get this MSG saying "Your system has not been modified" I cannot seem to find ANYONE that can help me and this is becoming very frustrating! I have just started this new job to edit photos and Corel is the best. and im losing money cause I cannot work. Can someone please PLEASE help me!!