My Vista system, 78% of the normal physical memory you?

First of all, you need to know the physical size of memory, 1G, 78% of normal to normal and I almost your landlord how much physical memory? 512M 1GB 2GB or more, generally speaking, 512M memory, not the number of installed memory will be occupied by a number of things 78% of it will not be too normal, 1G, then killed with soft or if there are many running back to the normal procedures (general goods accounted for the version of the machine More) this is normal, generally about 50-70%, 2G or 2G could not be more than normal may have to look at is not caused by poisoning or other reasons if it is 1G of memory is normal, the boot 600MB are on the run when the other software on the regular 100%, if the single-core processor is often double 100%