Drive Letter for Reserved Win 7 partition can be removed?

KLund1

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I have a multiboot system with Win XP thru Win10 over 2 separate(non-raid) SDD's. I mostly live in Win 7, But Win10 is looking really good now.
On the drive with Win7, I have that Reserved System partition. Somehow over time it received a drive letter D:.
Will it cause any trouble if I remove just the drive letter from this partition? I do NOT want to delete it. Just want to free up some space in Windows Explorer. I can't use that little partition for anything so why see it everyday? I'm not sure on which partition my MBR/bootloader in located. If it is in this little partition, and I remove the letter, will I have problems booting on the next re-boot?
I use EasyBCD as my bootloader program. I have a copy loaded in each OS.
Thoughts/ Suggestions?

Next somewhat related question. In each Win install the drive letters get mixed up. for example I have a large Data HDD with no OS on it. In Win 7 it has drive letter M:, in Vista it is L:, in Win 8.1 it is S:
While working in each OS can I change the DATA HDD drive letter, and not have a problem in another OS?

Thanks everyone!
 

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Win 7 Ultiamte x64Intel E85004GB Kensington HyperEVGA e6800
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Built
OS
Win 7 Ultiamte x64
CPU
Intel E8500
Motherboard
EVGA nforce 680i
Memory
4GB Kensington Hyper
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EVGA e6800
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onboard
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Sanyo 32" HD TV
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WD black 500Gig
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Thermatake 680
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none
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Zalman 7800 CPU gooler
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generic
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FF, IE, Chrone
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This is an offline MAME dedicated machine I'm building from extra parts I have. I use USB drive to move or update files
It should not a have letter, remove it.
 

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Windows 10 Pro x64Intel Core i7 6700KGSkill TridentZ RGB 16GB 3600 16-16-16-36EVGA GTX 980 Ti SC x2
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Skylake Special #666
OS
Windows 10 Pro x64
CPU
Intel Core i7 6700K
Motherboard
Asus Sabertooth Z170 Mark 1
Memory
GSkill TridentZ RGB 16GB 3600 16-16-16-36
Graphics Card(s)
EVGA GTX 980 Ti SC x2
Sound Card
Realtek High Definition
Monitor(s) Displays
AOC G2460PG
Screen Resolution
1920 x 1080 144Hz
Hard Drives
Samsung 860 Pro 256GB, Seagate Barracuda 4TB x2
PSU
EVGA 1000 P2, EVGA White Custom Braided Cables
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Corsair Vengeance C70 Gunmetal Black
Cooling
Corsair H100i v2, Corsair ML120 x2, Thermal Grizzly Kryonaut
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Logitech G910 Orion Spectrum
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Logitech G700s
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Verizon Fios Quantum Gateway 75/75
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Windows Defender, Malwarebytes Free 3.8.3
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Chrome
Other Info
Corsair SP120 x4, LG Blu-ray Drive, Durabrand HT-395 100 Watt Dolby Digital Amp, Corsair H2100 Wireless 7.1 Headset
You should be able to change DATA HDD letter to same, no problem in doing so.
 

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Windows 7 Ultimate x64 SP1AMD Phenom 2 1090T2x8GB Kingston HyperX Fury Black 1600Mhz Unga...MSI GTX 970 Gaming 4G
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
Windows 7 Ultimate x64 SP1
CPU
AMD Phenom 2 1090T
Motherboard
Gigabyte GA-890FXA-UD5
Memory
2x8GB Kingston HyperX Fury Black 1600Mhz Unganged
Graphics Card(s)
MSI GTX 970 Gaming 4G
Sound Card
Realtek On-Board HD 7.1 Audio / Logitech G35
Monitor(s) Displays
3xAcer GD245HQ
Screen Resolution
1920x1080
Hard Drives
Samsung 850 Pro 512GB SSD - OS /
WD Caviar Black SATA 3 - 1 TBx2 - Dynamic RAID 0 /
WD Caviar Green SATA 2 - 640GBx2 - Dynamic RAID 0 /
WD Caviar Green SATA 2 - 640GB - Internal Backup /
Seagate Barracude SATA 3 - 3TB - External Backup/ Sync
PSU
HighPower 1000W
Case
Cooler Master HAF 932
Cooling
Noctua NH-D14
Keyboard
Logitech G19
Mouse
Logitech G500
Internet Speed
100/4 Mbit Cable (100GB quota)
Antivirus
ZoneAlarm Extreme Security / MBAM Pro / MBAE Free / SAS Free
Browser
IE 11 - Firefox - Chrome
Other Info
Logitech F710/ G27/ G940/ Z5500 // TrackIR 5 // Nvidia 3D Surround Vision
you can remove it easily
 

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Windows 7 32bit
Computer type
PC/Desktop
OS
Windows 7 32bit
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