Hi apricot,
I have had a similar experience the above posters. We went from Amazing Charts version 8 up to 10. If anything, v10 is actually faster than v8 had been.
Amazing Charts technical support may be helpful, or it may actually be a problem with your computer, network, or so forth. Tech support usually limits their involvement to issues directly involving Amazing Charts, not issues with operating system and network.
There are some phenomenally knowledgeable tech people on this board. Sandeep (whom we use) and Indy come to mind. Either may be willing to log into your system and evaluate and/or troubleshoot. I believe their prices are very reasonable considering their degree of knowledge.
Additionally, if you are actually having a problem with your operating system, network, or so forth, you may switch electronic medical records and find similar problems with the new system.
Gene