What's is the rep +100 in the vfo programming list?

You mean FT-225RD not DR ?

The RD is a base station all mode 2 meter rig. Older model.
Set the Channel switch to VFO.
Use the Band selector to set the vfo to 144, 145, 146, or 147 mhz.
Then turn the vfo knob to select the frequency.

The Fix

Programming via CS-R6 with Windows 10 made the problem. Scanning was very slow.

The CS-R6 program through Windows 10 made problems with the scanning speed - it became very slow, one frequency in 2 seconds instead of 100 frequencies in one second.

Through programming CS-R6 on Windows 7, the scanning speed returned to the corresponding one in the ICOM instructions - 100 frequencies per second

It sounds like the sort of problem that needs an engineer to sort out.

[PDF]Page 1 INSTRUCTION MANUAL KENWOOD ...

manual.kenwood.com/files/B62-0790-10.pdf

o Contains 60 memory channels programmable with desired frequencies and ... o Do not modify this transceiver unless instructed by this manual or by ... BASIC TRANSCEIVER MODES . ..... 1 Press [VFO] to select VFO mode. P1'I switch, and ...

[PDF]INSTRUCTION MANUAL - Kenwood

manual.kenwood.com/files/TH-D7-English.pdf

memory channel to be named using up to 8 ... Do not modify this transceiver unless instructed by ...... In VFO or Memory Recall mode, use the keypad to select a ...

Modifying the Kenwood TH-78a handheld transciever

www.welcomehome.org/rainbow/.../kenwood/kenwood-th78-mods.html

Nov 17, 1995 - (When William's early-model TH-78 was upgraded his mods (removed .... channel (if in memory recall mode) or last frequency (if in VFO mode).Missing: th234

This sounds like a failure of the VFO encoder, which can be caused by a static discharge from your hand. Check to see if your grounding wires have been loosened. If this is the case, then static discharge is the most likely culprit. ICOM is very good about repairing radios and getting them back to you quickly, but it is of course cumbersome at best to send radios through the parcel service.

Sounds like you have the transmit lockout set. this radio is a bit of a pain to program, but is well worth the effort. your best bet is save your settings (backup) and do a full factory reset, and start over, making sure you did not lock out the transmit on any channel or VFO...

VFO stands for Variable Frequency Oscillator. This is the function that allows you to enter frequencies. It just means you are not in memory channel mode. You can get more info at the factory web sight and download the instruction manual for free.
http://www.icomamerica.com/en/products/receivers/handheld/r6/default.aspx

Check out the Creative support website

http://support.creative.com/Products/Products.aspx?catid=218

Buy the program again install and un-install?
That is with out a doubt the most asinine thing I have ever heard. Ignore him and try booting into Safe mode then run the add /remove program. The software is simply loading with the system files and once activated is difficult to remove while the Fix-it files are running. Many spyware and Virus programs do the exact same thing.
Running in safe mode loads just the bare essential files Windows needs to run. All others are skipped..

If this fails, try downloading and installing Revo link here.
It will ask to search the registry for stray entries left behind. Let it do this, but be careful deleting the registry entries. Be sure it is a stray from the Fix-it utilities. You can usually tell by checking the entry displayed.

Revo is a powerful clean up tool.
It will TRY to use the programs un-installer first.
"Most installations set up a "un-installer" file.
If Revo does not find one, It will automatically go to the next phase and do it's best to locate all the bits and pieces and purge them.

Good luck!
Hope this helps!

1. Press Menu (Bottom left hand side of the scanner) You should see "Program System"
Press E You should see "Select System"
2. Turn VFO knob (Top outside right knob on the scanner as it faces you.) until "New System is displayed.
3. Press E
4. Using the VFO knob, select "Conventional then press E three times
5. Press the decimal key until all the letters under "Edit Name’ disappears
6. Now you’re ready to name your system. Turn the VFO to the to select a letter or number. Once the letter or number is selected, hold the Function key (Top left hand side of the scanner) while turning the VFO knob to the right to add another letter or number. When you finish, press E
7. Turn VFO to Edit Group then press E
8. Use VFO to select New Group then press E twice
9. Press the decimal key until all the letters under "Edit Name’ disappears
10. Now you’re ready to name your group. Turn the VFO to the to select a letter or number. Once the letter or number is selected, hold the Function key (Top left hand side of the scanner) while turning the VFO knob to the right to add another letter or number. When you finish, press E
11. Turn the VFO to Edit Channel then press E. (You should now see "New Channel")
12. Press E then enter a frequency
13. Press E twice
14. Press the decimal key until all the letters under "Edit Name’ disappears
15. Now you’re ready to name your "Subgroup" i.e. " Dispatch" Turn the VFO to the to select a letter or number. Once the letter or number is selected, hold the Function key (Top left hand side of the scanner) while turning the VFO knob to the right to add another letter or number. When you finish, press E then menu
16. Use VFO to select New Channel
17. Repeat steps 12 through 16