From KB Article 898982
Performance issues that occur when you open windows
The AutoComplete feature may cause performance issues when you open windows in Microsoft Dynamics GP 9.0 and in Microsoft Great Plains 8.0. To turn off the AutoComplete feature, follow these steps:1. Click Tools, point to Setup, and then click User Preferences.
2. Click the AutoComplete button.
3. Click to clear the Show AutoComplete Suggestions check box.
4. Click OK.
5. In Windows Explorer, delete the AutoCmpl.dat file and the AutoCmpl.idx file. These files are in the following folder:
Document and Settings\username\Application Data\Microsoft Business Solutions\Great Plains\dbname\
6. Repeat step 1 through step 5 for each user.
David Musgrave [MSFT]
Senior Development Consultant
Escalation Engineer - Great Plains
Microsoft Dynamics Support - Asia Pacific
Micorosoft Dynamics (formerly Microsoft Business Solutions)
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and confers no rights.