Physical Memory is memory of the computer where the program is loaded for the use of the user. For eg., whn u open any word processor (WP) the various functions provided by the WP is loaded in the physical memory of the Computer. and from there u cn use the function like underlining any word,etc.
now ur problem cn be due to several reasons::
* the first being the possibility of ur computer being attacked by a virus. these type of viruses r very common. U cn use an Antivirus SOFTWARE to detect and delete the virus.
*the second is tht there is a possibility tht different laptops use different types of drivers which occupy a sufficient amt of Physical memory. for tht u have to comtact ur vendor and get it fixed.
* then there cn be sumthin' like u might have installed some new software which runs on the background and occupies a hell lot of physical memory. in WIN XP u cn fix it up pressing ctrl+alt+del and then processes tab. there u cn get details of all the processes tht r running.then u cn delete the desired ones or stop thm
TRY THESE 3. Hope ur Question is answered. If not POST the question again and dont hesitate to mail me at firstname.lastname@example.org