Thinkpad W530, cannot save to windows partition

Thinkpad W530, cannot save to windows partition

I recently purchased a Thinkpad W530 laptop from Lenovo with Windows 7 on
it. I installed Lubuntu 13.04 on it, and then mounted my OS partition in
Lubuntu 13.04. I have found that whenever I tried to save a file into this
partition (any file, any directory), Lubuntu seems to transfer or save the
files just fine, and I am able to edit them without any apparent errors in
Lubuntu. However, when I shutdown and reboot into Windows, not only are
those files GONE (not even hidden, actually gone) but when I shutdown and
reboot back into Lubuntu the files are gone there as well. In addition,
when I run a chkdsk in Windows, it shows that the files I transferred are
actually corrupted and must be deleted. I should mention that I had also
tried this same test by removing Lubuntu and using Xubuntu, with the same
results.
I have installed Ubuntu, Lubuntu, SUSE, and other distros on my previous
personal computers without any such problems ever arising. So, I am very
confused by this behavior. Does anyone have any advice regarding this
problem, or has anyone solved this problem on their own machines?