Some times when you install a new deb package, the system will be broken. We may have to remove the package.
For this , you can try the following. ( Assuming aspell is the broken package)
# apt-get remove aspell
#dpkg -P aspell
#dpkg –force-all -r aspell
These methods can also fail some time. Your only way out will be a manual removal of packages, which can be achieved as detailed below.
a) Get a list of files from the package
# # dpkg -L aspell
b) Remove the files one by one.
c) It is also suggested that you run
# apt-get remove aspell
after manual removal.