[Flash Drive] USB transfer speed EXTREMELY SLOW!

I have a SanDisk Flash drive 4GB. Recently I noticed that the transfer rate has gone down ALOT ! It is only 1MB Per second, when it used to be around 12/15 MB Per second. I reformatted it to FAT32 and NTFS no luck, but only when I'm trying to transfer files to my computer. On my laptop it transfers and writes at normal speed. Any help ?

I have:
Acer Aspire AX3200
Win7 64 Bit
4GB Ram
2.1 GHz Triple-Core